Question

The Baltimore Aquarium requires 3 adult chaperones for every 15 students on a field trip. How many chaperones would be needed for a group of 125 students?

Answer 1

There would need to be 25 adult chaperones. 

The ratio would be 3 adults to every 15 kids. 3:15
To find how many adults are needed for 125 kids you would simply divide.
125/5=25

Hope this helps! :)